Taboo Word
Taboo Phrase, Dirty Word, Bad Word
noun
A paragraph that is under prohibition is under prohibition because it contains a taboo word or taboo phrase. Do not say this word, please!
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
シーッ！それは禁句ですよ！
Shh! That's a forbidden phrase!
これからは、「可愛い」は禁句ですよ。
From now on, "Kawaii" is a forbidden phrase, okay?
ウチの社長の前では「今度」とか「いつか」は禁句です。今日できることは今日やってしまうポリシーの人なんで。
In front of our president, phrases like "next time" or "someday" are forbidden. He's a person who follows the policy of doing things today if they can be done today.